Textbook Question
Why must the breakdown of molecules for energy in the body occur in several steps, rather than in one step?
21. The Generation of Biochemical Energy
Energy Production In Biochemical Pathways
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Which of the following biochemical reactions would not produce energy?
A
ATP + H2O → ADP + HOPO32− + H+
B
6-phosphogluconate + NADP+ → ribulose-5-phosphate + CO2 + NADPH
C
Pyruvate + NAD+ + HS–CoA → Acetyl CoA + CO2 + NADH
D
Glucose + ATP → glucose-6-phosphate + ADP + H+
Verified step by step guidance1
Identify the type of reaction: Determine if the reaction is catabolic (breaking down molecules to release energy) or anabolic (building up molecules, usually requiring energy).
Analyze the ATP involvement: Reactions that involve the hydrolysis of ATP (ATP + H2O → ADP + Pi) typically release energy, as ATP is a high-energy molecule.
Consider the role of NAD+/NADH and NADP+/NADPH: These coenzymes are involved in redox reactions. NAD+ to NADH and NADP+ to NADPH conversions are associated with energy transfer.
Evaluate the reaction products: Look for the formation of high-energy compounds or the release of CO2, which often indicates energy release.
Apply the above analysis to each reaction: Determine which reaction does not fit the pattern of energy production, focusing on the reaction that involves the conversion of glucose and ATP, which is typically an energy-consuming process.
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